Quantumness without the quantum world?
speaker: Mauro Paternostro (Queen's University Belfast)abstract: Among the goals that modern quantum science aims at achieving, one of the most elusive and yet intriguing and fascinating is a full understanding of the quantum-to-classical transition and the role that "microscopicity" plays in the occurrence of genuinely non-classical phenomena. This talk deals exactly with all this. I will show that failure of local realism can be revealed to observers for whom only extremelycoarsegrained measurements are available. In the instances I will treat, a Bell's inequality is violated even up to the maximum limit while both the local measurements and the initial local states under scrutiny approach the classical limit. Furthermore, one can observe failure of local realism when an inequality enforced by non-local realistic theories is satisfied. This suggests that locality alone may be violated while realism cannot be excluded for specific observables and states. Smallscale opto-mechanical and alloptical experimental demonstrations of such examples are described in some details. The "Holy Grail" may still be missing but, certainly, we are having fun!
timetable:
Fri 6 Nov, 12:00 - 12:30, Aula Dini
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